Patents by Inventor Sadanori Shitara

Sadanori Shitara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6968165
    Abstract: A frequency scanning receiver minimizes the time needed for setting the frequency of a phased lock loop of a first local oscillator. The frequency scanning receiver is configured so that when the reference frequency of the PLL of the first local oscillator has been set at a high frequency, and the frequency error is less than the second IF, the frequency error is controlled to be zero by the control circuit switching the frequency of a second local oscillator or third local oscillator to an appropriate frequency using an output of a frequency discriminator.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: November 22, 2005
    Assignee: General Research of Electronics, Inc.
    Inventors: Sadanori Shitara, Kiyoshi Wakui, Nobuaki Yokoyama
  • Patent number: 6690303
    Abstract: A character input method enables mistake of character input to be diminished, and it is unnecessary to use a rotary type switch in the character input method, therefore it is economical. In a frequency scanning type receiver, when it causes character input to be performed according to a key board section, respective numeric-keys 1 to 0 of 10-key correspond to a plurality of character groups consisting of capital letter, small letter of an alphabet, and numerals arranged in accordance with prescribed order to be determined. CPU/memory section selects the corresponding character group according to a numeric-key which is pressed firstly, next, the CPU/memory section selects corresponding alphabet character, numeral from among character group according to numeric-key which is pressed secondly.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: February 10, 2004
    Assignee: General Research of Electronics, Inc.
    Inventors: Sadanori Shitara, Nobuaki Yokoyama
  • Publication number: 20020168953
    Abstract: A frequency scanning receiver comprises a first local oscillator, a second local oscillator, a Nth local oscillator, a memory, a control circuit and etc.
    Type: Application
    Filed: May 6, 2002
    Publication date: November 14, 2002
    Inventors: Sadanori Shitara, Kiyoshi Wakui, Nobuaki Yokoyama
  • Publication number: 20020160736
    Abstract: A frequency scanning receiver not requiring the time for setting the frequency of the PLL of the first local oscillator and using a method capable of setting the receiving frequency in a simple circuit configuration, wherein the frequency scanning receiver is configured so that in the case where the reference frequency of the PLL of the first local oscillator has been set at a high frequency, when the frequency error is less than the second IF, it is configured so that the frequency error is controlled to be zero by the control circuit switching the frequency of the second local oscillator or the third local oscillator to an appropriate frequency using an output of the frequency discriminator.
    Type: Application
    Filed: April 22, 2002
    Publication date: October 31, 2002
    Inventors: Sadanori Shitara, Kiyoshi Wakui, Nobuaki Yokoyama